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authorSowjanya Komatineni <skomatineni@nvidia.com>2019-04-11 12:18:19 -0700
committerUlf Hansson <ulf.hansson@linaro.org>2019-04-15 12:04:09 +0200
commit71c733c4e1aeb83e8221e89caeec893d51f88b7b (patch)
tree3cf39e6958e6c0185227f89c6ae9630609c0cb42 /drivers/mmc
parentc07a48c2651965e84d35cf193dfc0e5f7892d612 (diff)
downloadlinux-71c733c4e1aeb83e8221e89caeec893d51f88b7b.tar.bz2
mmc: tegra: add sdhci tegra suspend and resume
This patch adds suspend and resume PM ops for tegra SDHCI. Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-tegra.c58
1 files changed, 57 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index eafaaefab4a6..f608417ae967 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -1611,11 +1611,67 @@ static int sdhci_tegra_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int __maybe_unused sdhci_tegra_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int ret;
+
+ if (host->mmc->caps2 & MMC_CAP2_CQE) {
+ ret = cqhci_suspend(host->mmc);
+ if (ret)
+ return ret;
+ }
+
+ ret = sdhci_suspend_host(host);
+ if (ret) {
+ cqhci_resume(host->mmc);
+ return ret;
+ }
+
+ clk_disable_unprepare(pltfm_host->clk);
+ return 0;
+}
+
+static int __maybe_unused sdhci_tegra_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int ret;
+
+ ret = clk_prepare_enable(pltfm_host->clk);
+ if (ret)
+ return ret;
+
+ ret = sdhci_resume_host(host);
+ if (ret)
+ goto disable_clk;
+
+ if (host->mmc->caps2 & MMC_CAP2_CQE) {
+ ret = cqhci_resume(host->mmc);
+ if (ret)
+ goto suspend_host;
+ }
+
+ return 0;
+
+suspend_host:
+ sdhci_suspend_host(host);
+disable_clk:
+ clk_disable_unprepare(pltfm_host->clk);
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sdhci_tegra_dev_pm_ops, sdhci_tegra_suspend,
+ sdhci_tegra_resume);
+
static struct platform_driver sdhci_tegra_driver = {
.driver = {
.name = "sdhci-tegra",
.of_match_table = sdhci_tegra_dt_match,
- .pm = &sdhci_pltfm_pmops,
+ .pm = &sdhci_tegra_dev_pm_ops,
},
.probe = sdhci_tegra_probe,
.remove = sdhci_tegra_remove,